Edit in JSFiddle

<div style="margin-bottom:2000px;">
빈 공백 <a href="#bottom">밑으로</a>
</div>
3개 중에 아무것이나 1개 사용 해보기<br /><br />
1. <div class=topBtn onclick="window.scrollTo(0,0);" style="display:inline;">TOP</div><br />
2. <span class=topBtn onclick="window.scrollTo(0,0);">TOP</span><br />
3. <a name=bottom href="javascript:window.scrollTo(0,0);">TOP</a><br />
.topBtn {cursor:pointer;}